And twisting machines



(N0 Model.)

2 Sheets-Sheet 1. J. BOYD. STOP MOTION MECHANISM FOR WINDING AND TWISTING MACHINES, &c.

No. 326,391. Patented Sept. 15, 1885.

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(No Model.) 2 Sheets-Sheet 2.

J. BOYD.

STOP MOTION MECHANISM FOR WINDING AND TWISTING MACHINES, 6L0= No. 326,391. Patented Sept. 15, 1885.

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UNITED STATES PATENT Genres.

JOHN BOYD, OF GLASGOW, COUNTY OF LANARK, SCOTLAND.

STOP-MOTION MECHANISM FOR WINDING AND TWISTING MACHINES, dc.

SPECIFICATION forming part of Letters Patent No, 326,391, dated September 15, 1885.

Application filed December 4, 1884. (No model.) Patented in England November 1 1884. No. 15,171.

To all whom it may concern:

Be it known that I, JOHN BOYD, of Glasgow, county of Lanark, Scotland, in the Kingdom of Great Britain and Ireland, have invented a new and useful Improvement in Stop-Motion Mechanism for Winding and Twisting Machines, &c., of which the following is a specification. My invention consists of certain improvements in the stop-motion mechanism of wind ing, doubling, and twisting machines, for which Letters Patent were obtained June 7, 1881, No. 242,591, November 28, 1882, No. 268,178, and August 5, 1884, No. 303,209.

In the accompanying drawings, Figure l is a transverse vertical section of a twistingframe similar to that described and illustrated in the letters patent above referred to, but embodying my present improvements. In this figure the stopping devices are shown v applied on opposite sides of the frame, the

when wet twisting is in, progress.

devices on the left-hand side being illustrated as when twisting is in progress, while those on the right-hand side are shown as when a thread has been broken in front of the feedrollers and the twisting is stopped. The remaining figures of the drawings are detailed illustrations .of my present improvements, Figs. 2 and 3 being respectively a sectional elevation and a plan view of my improved stop-motion, provided with a water trough, Figs. 4 and 5 are similar views of parts of the stopmotion as adapted for ordinary dry twisting. Figs. 6 and 7 are detached views of the threadguide used for wet twisting. Fig. 8 is a plan view of the combined thread-guide and starting and detector lever. Figs. 9 and 10 are detached views of the adjustable bracket on which the lever is centered. Figs. 11 and 12 are views of one form of the auxiliary detector. Fig. 13 is a front view of the detectorholder and detector. Figs. 14 and 15 are detached views of the combined catch and guide plate to be fixed to the main rail 41. Fig. 16 is a front" elevationof the adjustable rollerbracket; and Fig. 17 is a detached plan view of the curved arm for carrying the detectorholder.

Some of the principal parts of the machine are similar in their construction and operation to those shown and described in the patents above referred to, and I will first briefly describe the main operating parts of the machine as illustrated in Fig. 1.

Motion is imparted to the, spindles 32 on each side of the frame through the medium of an endless band, 33, passing over a pulley or cylinder, 34, on a main driving-shaft. Each of these bands passes over a grooved roller in a counter-weighted lever, 42, which is pivoted in a bracket fixed to one of the lower rails of the frame of the machine, while the short arm of this counter-weighted lever is pivoted to and supports a vertical rod, 37, carrying at the upper end the detector devices and the upper feed-roll, 24, as hereinafter referred to. One loop of the endless band 33 passes between the. gripping devices 44, as described in the aforesaid patents.

At the upper end of each rod 37 is a catch plate, 39, which engages with a guiding-piece, 40, adjustably secured to the rail 41 of the frame of the machine, as shown in Figs. 2 and V 4, and to the upper end of this rod 37 is secured a curved arm, 37, which has at its outer end an arm, 37', to which is bolted the detector holder, similar in construction to those described in the previous patents. Each detectorholder carries weighted detectors 21 through eyes on which pass the threads to be twisted. These detectors have enlarged lower ends, which, when the detectors fall, are acted on by the rotating cam 35.

The upper feed-roller, 24, when in its lowered position, rests on the lower feed-roller, 25, to which a constant rotary motion is imparted. This roller and the cam 35 may receive their motion from the main shaft,which carries the pulley or cylinder 34, through the medium of suitable gearing, as indicated by dotted lines in Fig. 1. Immediately behind the feed-rollers is the usual traverse-bar, 23, carrying the threadguides.

The parts above described do not differ essential-ly from the corresponding parts illustrated in the prior patents referred to, and I will now proceed to describe my present improvements.

roller, 24, has at its lower end overlapping flanges or ledges 43, Fig. 16, fitting the square head of the rod37, to which" the bracket is secured'by a screw-bolt, 47, passing through a vertical slot in the bracket, in order that the latter maybe adjusted vertically to the proper position in relation to tlie'lower feedroll.

On the side of each arm 37 is formed apin, 37, to which is connected a spring, 38, this spring serving for two devices on opposite sides of the machine and keeping the rods 37 in contact with the guide-plates 40. The spring also pulls the curved arms 37 of the vertical rods 37, to which it is connected, against the adjustable brackets 45, so that the latter, as well as the plates 40, act as guides for the vertical rods.

To the top of the rail 41 is secured a pivota lever, 29, carrying at one end a porcelain or other suitable eye, 28, through which the threads are to pass,while at the other end the lever carries an enlarged head, 29', with a smooth upper face, on which rests'the aux iliary detector 46. The construction of this detector is illustrated in Figs. 11 and 12, and it is adapted to guide-slots 36 and 36" in the detector-holder 36. It also carries enlarge-- meuts 46,which,when thedetector falls, liein the path of the cam 35, as do the similar enlargements on the detectors 21,when they fall, owing to the breaking of threads. The lever 29 is also provided with a nose or projection, 29, which is adapted to rest on a lip, 37", on the arm 37, carried by the rod 37.

The threads 19 to be twisted together are led from bobbins 20, or from cops, through one, two, or more of the detectors 21, which will vary in number according to the number of bobbins from which the strands are taken.

Vhen the threads are to be,twisted wet, they are, by preference, led through the slit a of the thread-guide 22, Figs. 6 and 7, in the traverse-bar 23, and thence between the upper and lower feed'roller's, 24 and 25,'back over the upper feed-roller, then through the slit b of the guide 22, and down and around a glass rod, 26, in a water-trough, 27, which is secured to a. fixed portion of the frame and extends below the lower feed-roller, 25, without interfering, however, with any of'the operating parts of the mechanism. The threads then pass upward through a slit, 0, of the guide 22, and between the upper and lower feed-rollers to an eye, 28, at the front end of the lever 29,which, as will be hereinafter seen,

constitutes not only a thread-guide, but also a deteetorlever and a starting-lever. The

lower feed-rollers, and back over the upper feed rollers around a glass 'or'" porcelain stud on the traverse-bar. Then the threads pass between the upper and lower feed-rollers to the eye 28 in the lever 29, and thence to the ring-traveler and bobbin. While the strands are-being twisted together into one thread and remain whole, the strand of the thread keeps the front end of the lever 29 down, as shown in Figs. 2 and 4, with the projection 29 resting against the lip 37" on the arm of the rod 37, (and thus acting as a stop.) and the heavier back end of the lever 29 is kept elevated, so as to keep its special detector 46 in its raised position in the detector-holder 36,with the enlarged or projecting part 46 clear of the revolving cam. Should the thread 19 get broken or fail, however,the eye end of the lever 29 being released, the weighted end will fall down and permit the projecting part of its detector to fall into the path of the revolving cam 35, which, by pressing on it, throws the vertical rod 37 forward and disengages the catch-plates 39 and 40. Then the counterweight 42 will raise the rod 37, and with it its long curved arm 37 and the adjustable rollerbracket 43, together with the upper feedroller, 24, clear of the lower driven roller, 25, thus stopping the feed. At the same time the detector-holder 36, carried by the arm 37 on the rod 37 will be raised so as to elevate the detectors clear of the cam 35 and move the detector-lever 29 from the position shown on the left-hand side of Fig. 1 to the position shown on the right-hand side. At the same time the counterweight 42, falling, leaves the band 33 slack and holds the same with the grips 44, so that the bobbin 32 will cease to revolve. Similarly, when the thread breaks behind the feed-rollers, and its corresponding detector 21 falls intothe path of the rotating cam 35, the same stopping action will result, as above described.

To start or put the device into action again, the front end of the lever 29 is pressed down, so'that the projection 29", acting on the lip 37", will depress the rod 37 and restore the parts to their normal working positions, as shown at the left-hand side of Fig. 1. Thus it will be seen thatthe lever 29 performs the threefold function of a deteotor-lever,athreadguide, and the starting-lever.

I claim as my invention 1. The combination of the detectors of a stop-motion and a stopping-rod, 37, with a lever, 29, forming at one end a thread-guide and acting on the said detectors and also on the rod 37 ,whereby the said lever 29 performs the threefold function of a thread-guide, detector-lever and startinglever.

2. The combination of the frame carrying a catch-plate, 40,with a stopping-rod, 37, carry ing a catch to engage therewith, and carrying also the detector-holder and detector with a cam to 'act on the detector, a pivoted lever, 29, having at one end a thread-guide and at the other end supporting a detector and adapted In testimony whereof I have signed my name to to act on the said rod 37, all substantially as to this specification in the presence of two subdescribed. scribing witnesses.

3. The combination of the stopping-rod 37, JOHN BOYD. 5 carrying the detector-holder 36 and detectors Witnesses:

46 of a stop motion,with the pivoted lever 29, THOMAS MCKEAN, supporting at one end one of said detectors ROBERT WYLIE,

and carrying at the othera thread-guide,sub- Law clerks, both of 107 West Regent Street, stantially as described. Glasgow. I 

